Compilare: user.cpp: In function ‘int main()’: user.cpp:15:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.in", "r", stdin); ^ user.cpp:16:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.out", "w", stdout); ^ user.cpp:21:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &r, &c); ^ user.cpp:50:35: warning: ‘begin.POZ::y’ may be used uninitialized in this function [-Wmaybe-uninitialized] n1.val = dmin[begin.x][begin.y]; ^ user.cpp:69:45: warning: ‘end.POZ::x’ may be used uninitialized in this function [-Wmaybe-uninitialized] }while((n1.x != end.x || n1.y != end.y) && d.size() > 0); ^ user.cpp:70:23: warning: ‘end.POZ::y’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (n1.x == end.x && n1.y == end.y) ^ user.cpp:50:35: warning: ‘begin.POZ::x’ may be used uninitialized in this function [-Wmaybe-uninitialized] n1.val = dmin[begin.x][begin.y]; ^